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Advanced TypeScript: Type Inference and Advanced Types

Tutorial August 05, 2024
typescript

const handler = (event: MouseEvent) => {
  console.log(event.button); // inferred as MouseEvent
};

window.onclick = handler;
interface Person {
  name: string;
  age: number;
}

interface Employee {
  employeeId: number;
}

type EmployeePerson = Person & Employee;

const john: EmployeePerson = {
  name: 'John Doe',
  age: 35,
  employeeId: 1234
};